JPH0682475U - Double pilot type switching valve - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a double pilot type directional control valve that has a small installation space and has no erroneous operation of the manual operation part. [Structure] The first and second parts are provided on both sides in the axial direction of the valve body 4 of the main valve 1.
The manual operation parts 2a and 2b of the first manual operation part 2 are attached.
The first and second pilot solenoid valves 3a are provided on one axial side of a.
3b are installed side by side. Further, on both sides of the valve body 4 in the axial direction, lamps 23a, 23 for indicating energization to each pilot solenoid valve are provided.
b is provided. [Effect] Since the pilot solenoid valves are installed side by side on one side of the switching valve, the installation space for the entire switching valve is small, and since the manual operation parts are provided on both sides in the axial direction of the main valve, erroneous operation of the manual operation part is prevented. Almost never.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a double pilot type switching valve

[0002]

[Prior art]

 Double pilots with pilot solenoid valves for supplying and exhausting pilot fluid to and from the pilot chambers of the main valve on both sides in the axial direction of the main valve, and manual operating sections between the main valve and these pilot solenoid valves. Shape change valves are already known, without any particular exemplification. However, the above-mentioned known switching valve has a problem that the installation space becomes large because the axial length of the switching valve becomes long due to the manual operation portions provided on both axial sides of the main valve and the pilot solenoid valve.

In order to solve this problem, a double pilot type switching valve has been proposed in which two pilot solenoid valves and two manual operation parts are arranged side by side on one axial side of the main valve. The previously proposed directional control valve has two pilot solenoid valves and a manual operation unit side by side on one side of the main valve. It has the advantage that it can be made smaller, but since two manual operating parts are installed in parallel on one side of the main valve, the pilot solenoid valve cannot be operated due to an accident such as a power failure, and the manual operating part is operated. Occasionally, other manual controls may be operated by mistake.

[0004]

[Problems to be solved by the device]

 The problem to be solved by the present invention is to provide a double pilot type directional control valve which has a small installation space and has no erroneous operation of a manual operation part.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a pressure fluid supply port, two output ports and a discharge port, a valve body for connecting these output ports to a supply port and a discharge port, and a valve body. A main valve having first and second pilot chambers on both sides in the axial direction, and first and second pilot solenoid valves for supplying and discharging pilot fluid to and from the first and second pilot chambers. In a double pilot type switching valve that drives the valve element by the pilot fluid supplied to and discharged from the first and second pilot solenoid valves to the first and second pilot chambers, by pressing on both axial sides of the main valve, The first and second manual operation parts having first and second manual operation buttons for directly supplying the fluid of the supply port to the first and second pilot chambers are provided, and On either side of the axial direction, 1, is characterized in that juxtaposed the second pilot valve. In addition, in order to solve the same problem, in the double pilot type switching valve, a first lamp for indicating the energization of the first pilot valve is provided on the first manual operation portion side of the main valve, and a second lamp is provided. It is characterized in that a second lamp for indicating the energization of the second pilot valve is provided on the manual operation section side.

[0006]

[Action and effect of the device]

 The first and second manual operation parts are provided on both sides in the axial direction of the main valve, and the first and second pilot solenoid valves are arranged side by side on one side of the one manual operation part. Since the axial length of the switching valve can be shortened as compared with the case where a manual operation unit and a pilot solenoid valve are provided on each side, the installation space can be reduced. Further, since the first and second manual operation parts are provided on both sides of the main valve in the axial direction, erroneous operation of the manual operation part can be almost eliminated.

Further, since the first and second lamps for indicating the energization of the first and second pilot solenoid valves are provided on the corresponding manual operation part side, the switching position of the valve body is not changed. It can be visually confirmed in the section.

[0008]

【Example】

 1 and 2 show an embodiment of the present invention. This double pilot type switching valve comprises a main valve 1 and first and second manual operating portions 2a, 2b mounted on both axial sides of the main valve 1, respectively. , And the first and second pilot solenoid valves 3a and 3b arranged in parallel on one side of the first manual operation part 2a, and the main valve 1 is attached to the base 6 by the attachment screws 5 and 5.

The valve body 4 of the main valve 1 includes a pressure fluid supply port P, output ports A and B, and discharge ports EA and EB, an axial through hole, a sleeve attached to the through hole, and the sleeve. When a valve body (spool) 7 is slidably inserted into the valve body 4 and the valve body 4 is mounted on the base 6, the supply port P and the discharge ports EA and EB are connected to the base 6 in the connecting direction (Fig. The supply flow path 8 and the discharge flow paths 9a and 9b passing through in a direction orthogonal to the output ports A and B are connected to the output ports 10a and 10b opening on the front surface of the base 6, respectively. Pistons 13a and 13b are slidably inserted into the first and second pilot chambers 12a and 12b formed at both ends of the through hole, and the valve body 7 is connected from the pilot solenoid valves 3a and 3b to the pilot chambers. The first switching position in which ports P and A and B and EB communicate with each other and the second switching position in which ports P and B and A and EA communicate with each other by the pilot fluid supplied to and discharged from 12a and 12b. It can be switched to and.

The first and second pilot solenoid valves 3a and 3b have a pilot supply port, a pilot output port, and a pilot discharge port (all are not shown), and the pilot output can be performed by exciting and deenergizing solenoid. The port is configured as a well-known 3-port solenoid valve that connects the pilot supply port and the pilot discharge port to communicate with each other. The pilot supply port of these pilot solenoid valves is a common supply passage 16 formed in the valve body 4. Communicate with the supply port P of the main valve 11 by means of a common pilot discharge passage 18 through which the pilot discharge port 18 communicates with the discharge port EA of the main valve 1, and the pilot output port of the first pilot solenoid valve 3a is The first pilot passage 17a allows the second pilot power to enter the first pilot chamber 12a. The pilot output port of the magnetic valve 3b communicates with the second pilot chamber 12b through the second pilot passage 17b. Further, in the pilot discharge passage 18, there is provided a check valve 19 for preventing the discharge fluid of the main valve 1 from flowing into each pilot valve.

The first manual operation part 2a is provided with a first manual operation button 21a for directly communicating the pilot supply passage 16 and the second pilot passage 17a by pressing, and a second manual operation part 2b is provided. A second manual operation button 21b for directly communicating the pilot supply passage 16 and the second pilot passage 17b by pressing is provided respectively, and these manual operation buttons 21a and 21b are normally provided with a return spring (not shown). The urging force cuts off the communication between these passages to allow the first and second pilot passages 17a and 17b to communicate with each other.

In the concave portion 4a formed on the upper surface of the valve body 4 and having the opening on the side of the first manual operation portion 2a and the upper side, the first pilot solenoid valve 3a is provided on the side of the first manual operation portion 2a. The first lamp 23a for indicating the energization of the second pilot operating valve 2b and the second lamp 23b for indicating the energization of the second pilot electromagnetic valve 3b are attached to the second manual operation portion 2b by appropriate means. These lamps 23a and 23b are electrically connected to the corresponding pilot solenoid valves by power supply lines, and the recess 4a is provided by a cover 24 having a transparent or translucent portion mounted on the valve body 4. Is covered. In FIG. 1, reference numeral 25 is a power supply pin that supplies power to the pilot solenoid valves 3a and 3b from the base 6 side, and 26 and 26 are connection holes for connecting the base 6 in series.

In the above embodiment, when the main valve 1 having the manual operation portions 2a and 2b and the pilot solenoid valves 3a and 3b respectively mounted on both sides in the axial direction is installed on the base 6, each port of the main valve 1 is The bases 6, ... Can be connected to the corresponding flow paths of 6, respectively, and a desired number of bases 6, ... Can be connected continuously by connecting means (not shown) such as tie rods passing through the connecting holes 26,26.

When the pilot fluid is supplied from the first pilot solenoid valve 3a to the first pilot chamber 12a, the switching valve moves the valve body 7 to the right in the drawing to connect the ports P, A and B and EB. When the pilot fluid in the first pilot chamber 12a is discharged and the pilot fluid is supplied from the second pilot solenoid valve 3b to the second pilot chamber 12b, the valve body 7 returns to the state shown in FIG. To connect ports P and B and A and EA.

When the pilot solenoid valves 3a, 3b cannot be operated due to an accident such as a power failure, the manual operation buttons 21a, 21b of the manual operation units 2a, 2b are pressed to directly enter the pilot chambers 12a, 12b. Since the pressure fluid at the supply port P is supplied, the valve body 7 can be driven. In this case, since the first and second manual operation buttons 21a, 21b are individually provided on the corresponding pilot electromagnetic valves 3a, 3b side, it is possible to prevent erroneous operation of these manual operation parts.

Further, by providing the lamps 23a and 23b, which indicate the energization of the pilot solenoid valves 3a and 3b, on the corresponding pilot solenoid valves and the manual operation portion side on both axial sides of the main valve 1, the valve bodies are The switching position of No. 7 can be easily visually confirmed from the outside.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an embodiment.

FIG. 2 is a plan view of the same.

[Explanation of symbols]

 1 main valve 2a, 2b manual operation part 3a, 3b pilot solenoid valve 7 valve body 12a, 12b pilot chamber 21a, 21b manual phase operation button 23a, 23b lamp P supply port A, B output port EA, EB exhaust port

Claims (2)

[Scope of utility model registration request] 1. A pressure fluid supply port, two output ports and a discharge port, a valve body for connecting these output ports to a supply port and a discharge port for communication, and a first side on both axial sides of the valve body. , A main valve having a second pilot chamber and first and second pilot solenoid valves for supplying and discharging pilot fluid to and from the first and second pilot chambers, respectively. In a double pilot type switching valve that drives the valve body by pilot fluid supplied to and discharged from the first and second pilot chambers, the first and second fluids in the supply port are pushed by pressing on both axial sides of the main valve. The first and second manual operation parts having the first and second manual operation buttons for directly supplying to the second pilot chamber are provided, and the first manual operation part is provided with the first manual operation part on one side in the axial direction. ,
A double pilot type switching valve, in which a second pilot valve is installed in parallel. 2. A main lamp on the side of the first manual operation section is provided with a first lamp for indicating the energization to the first pilot valve, and a side on the side of the second manual operation section is energized to the second pilot valve. 2. The double pilot type switching valve according to claim 1, further comprising a second lamp for indicating each.